Refix root split check from 5da67968afb599697d7557c13b65fb961ec408dd

diff --git a/libraries/liblmdb/mdb.c b/libraries/liblmdb/mdb.c
index 1bd9cb718d5246c0293cfa2aeb4256c437624318..5e2b69069430e340500038de28b3e8a359342002 100644 (file)
--- a/libraries/liblmdb/mdb.c
+++ b/libraries/liblmdb/mdb.c
@@ -8450,6 +8450,7 @@ mdb_page_split(MDB_cursor *mc, MDB_val *newkey, MDB_val *newdata, pgno_t newpgno
        /* Copy separator key to the parent.
         */
        if (SIZELEFT(mn.mc_pg[ptop]) < mdb_branch_size(env, &sepkey)) {
+               int snum = mc->mc_snum;
                mn.mc_snum--;
                mn.mc_top--;
                did_split = 1;
@@ -8458,13 +8459,7 @@ mdb_page_split(MDB_cursor *mc, MDB_val *newkey, MDB_val *newdata, pgno_t newpgno
                        goto done;
 
                /* root split? */
-               if (mn.mc_snum == mc->mc_snum) {
-                       mc->mc_pg[mc->mc_snum] = mc->mc_pg[mc->mc_top];
-                       mc->mc_ki[mc->mc_snum] = mc->mc_ki[mc->mc_top];
-                       mc->mc_pg[mc->mc_top] = mc->mc_pg[ptop];
-                       mc->mc_ki[mc->mc_top] = mc->mc_ki[ptop];
-                       mc->mc_snum++;
-                       mc->mc_top++;
+               if (mc->mc_snum > snum) {
                        ptop++;
                }
                /* Right page might now have changed parent.
@@ -8595,8 +8590,6 @@ mdb_page_split(MDB_cursor *mc, MDB_val *newkey, MDB_val *newdata, pgno_t newpgno
                                continue;
                        if (!(m2->mc_flags & m3->mc_flags & C_INITIALIZED))
                                continue;
-                       if (m3->mc_flags & C_SPLITTING)
-                               continue;
                        if (new_root) {
                                int k;
                                /* root split */
@@ -8613,6 +8606,8 @@ mdb_page_split(MDB_cursor *mc, MDB_val *newkey, MDB_val *newdata, pgno_t newpgno
                                m3->mc_snum++;
                                m3->mc_top++;
                        }
+                       if (m3->mc_flags & C_SPLITTING)
+                               continue;
                        if (m3->mc_top >= mc->mc_top && m3->mc_pg[mc->mc_top] == mp) {
                                if (m3->mc_ki[mc->mc_top] >= newindx && !(nflags & MDB_SPLIT_REPLACE))
                                        m3->mc_ki[mc->mc_top]++;